WC、ZrO2 、Cr2O3 和Al2O3 陶瓷颗粒/ 镍合金复合涂层微观组织结构的分形

孙永立; 于朝阳; 史然峰; 犹公; 陆慧林

WC、ZrO₂ 、Cr₂O₃ 和Al₂O₃ 陶瓷颗粒/ 镍合金复合涂层微观组织结构的分形

1.
哈尔滨工业大学热能工程教研室, 哈尔滨 150001;
2.
哈尔滨锅炉厂有限责任公司, 哈尔滨 150046

基金项目: 哈尔滨工业大学跨学科交叉研究资助基金( HIT. MD. 2002. 31)

详细信息

通讯作者:
陆慧林,教授,博士生导师,从事流化床锅炉用金属和非金属材料实验和数值模拟 E-mail:huilin@hit.edu.cn

中图分类号: TB332
计量
- 文章访问数: 1693
- HTML全文浏览量: 87
- PDF下载量: 900
出版历程
- 收稿日期: 2004-06-06
- 修回日期: 2004-12-08
- 刊出日期: 2005-06-14

FRACTAL CHARACTERISTIC OF MICROSTRUCTURE OF WC, ZrO₂, Cr₂O₃AND Al₂O₃ CERAMIC PARTICLES/ NICKEL ALLOY COMPOSITE COATINGS

1.
Department of Power Engineering, Harbin Institute of Technology, Harbin 150001, China;
2.
Harbin Boiler Company Ltd., Harbin 150046, China

摘要

摘要: 采用等离子喷涂工艺, 制备了WC、ZrO₂ 、Cr₂O₃ 和Al₂O₃ 陶瓷颗粒/ 镍合金复合涂层。用X 射线衍射研究了陶瓷颗粒复合涂层相的分布; 用里氏硬度计测量陶瓷颗粒/ 镍合金复合涂层的硬度; 用CSS-1110 电子万能试验机研究陶瓷颗粒复合涂层的弯曲断裂性能。对涂层金相组织结构进行二值化处理, 利用Sandbox 法对陶瓷颗粒在金属基体中的分布进行研究, 得到了不同体积分数下陶瓷颗粒复合材料涂层的分维数。结果表明,陶瓷颗粒/ 镍合金复合涂层分维数随陶瓷颗粒含量的增加而增加, 与陶瓷颗粒种类无关; 陶瓷颗粒/ 镍合金复合涂层硬度和分维数随陶瓷颗粒直径减小而增加。随着分维数的增加, 复合涂层弯曲断裂角下降。
- 陶瓷颗粒 /
- 复合涂层 /
- 分形
Abstract: Four kinds of WC, ZrO₂, Cr₂O₃ and Al₂O₃ ceramic particles/ nickel alloy composite coatings were prepared with the plasma spraying method. The X-ray diff raction analysis was used to investigate the phase constituentof ceramic particles in composite coatings. The hardness of the ceramic particles/ nickel alloy composite coating wasmeasured by the Leeb hardness tester. The properties of bend breaking of composite coatings were measured usingCSS-1110 elect ric all-purpose test meter. The micro-st ructures of composite coatings were t reated as a binarizationaf ter morphological processing. The f ractal dimensions of the ceramic particles/ nickel alloy composite coatings withdifferent volume f ractions of particles were obtained by means of the Sandbox method. Experimental result s indicatethat the dist ributions of ceramic particles in metal mat rix have a f ractal characteristic. The f ractal dimensions increase with the increase of particle volume f ractions. The dimensions are irrelative with the kinds of ceramic particles. The hardness and dimension of composite coatings increase with the decrease of diameter of ceramic particles.The bending f racture angles decrease with the increase of dimensions of ceramic particles/ nickel alloy compositecoatings.
- ceramic particles /
- composite coatings /
- fractal